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########################################################################
##
## Copyright (C) 2007-2025 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {[@var{h}, @var{fail}] =} __patch__ (@var{p}, @dots{})
## Undocumented internal function.
## @end deftypefn
## __patch__ (p, x, y, c)
## Create patch object from x and y with color c and parent p.
## Return handle to patch object.
function h = __patch__ (p, varargin)
h = NaN;
nargin = nargin - 1;
is_numeric_arg = cellfun (@isnumeric, varargin);
if (isempty (varargin))
args = {};
elseif (is_numeric_arg(1))
if (nargin < 3 || ! is_numeric_arg(2))
print_usage ("patch");
endif
if (nargin >= 4 && all (is_numeric_arg(1:4)))
x = varargin{1};
y = varargin{2};
z = varargin{3};
c = varargin{4};
iarg = 5;
elseif (nargin >= 3 && all (is_numeric_arg(1:3)))
x = varargin{1};
y = varargin{2};
if (nargin > 3 && iscolorspec (varargin{4}))
z = varargin{3};
c = varargin{4};
iarg = 5;
else
z = [];
c = varargin{3};
iarg = 4;
endif
elseif (nargin >= 3 && all (is_numeric_arg(1:2)))
x = varargin{1};
y = varargin{2};
z = [];
if (iscolorspec (varargin{3}))
c = varargin{3};
iarg = 4;
elseif (nargin == 3)
error ("patch: invalid color specification C");
else
c = [];
iarg = 3;
endif
endif
if (isvector (x))
x = x(:);
y = y(:);
z = z(:);
if (isnumeric (c))
if (isvector (c))
if (isequal (size (c), [1, 3]))
## Do nothing, this is a single RGB color specification
elseif (numel (c) == numel (x))
c = c(:);
endif
elseif (rows (c) != numel (x) && columns (c) == numel (x))
c = c.';
endif
endif
endif
args{1} = "xdata";
args{2} = x;
args{3} = "ydata";
args{4} = y;
args{5} = "zdata";
args{6} = z;
if (isnumeric (c) && ! isempty (c))
if (ndims (c) == 3 && columns (c) == 1)
c = permute (c, [1, 3, 2]);
endif
if (isvector (c) && numel (c) == columns (x))
## One color per face
if (isnan (c))
args{7} = "facecolor";
args{8} = [1, 1, 1];
else
args{7} = "facecolor";
args{8} = "flat";
endif
args{9} = "facevertexcdata";
args{10} = c(:);
elseif (isrow (c) && numel (c) == 3)
## One RGB color
args{7} = "facecolor";
args{8} = c;
args{9} = "cdata";
args{10} = [];
elseif (ndims (c) == 3 && size (c, 3) == 3)
## CDATA is specified as 3-D RGB data
if ((rows (c) == 1 && columns (c) == 1) ...
|| (rows (c) == 1 && columns (c) == columns (x)))
## Single patch color or per-face color
args{7} = "facecolor";
args{8} = "flat";
args{9} = "cdata";
args{10} = c;
elseif (rows (c) == rows (x) && columns (c) == columns (x))
## Per-vertex color
args{7} = "facecolor";
args{8} = "interp";
args{9} = "cdata";
args{10} = c;
else
error ("patch: invalid TrueColor data C");
endif
else
## Color vectors
if (isempty (c))
args{7} = "facecolor";
args{8} = "interp";
args{9} = "cdata";
args{10} = [];
elseif (size_equal (c, x) && size_equal (c, y))
args{7} = "facecolor";
args{8} = "interp";
args{9} = "cdata";
args{10} = c;
else
error ("patch: size of X, Y, and C must be equal");
endif
endif
elseif (iscolorspec (c))
## Color specification is a string
args{7} = "facecolor";
args{8} = lower (c);
args{9} = "cdata";
args{10} = [];
elseif (! isempty (c))
error ("patch: invalid color specification C");
endif
args = [args, varargin(iarg:end)];
else
## "Property"/Value pair input
args = varargin;
endif
if (isempty (p))
p = gca ();
endif
h = __go_patch__ (p, args{:});
endfunction
function retval = iscolorspec (arg)
retval = false;
if (ischar (arg))
persistent colors = {"y", "yellow", "r", "red", "m", "magenta", ...
"c", "cyan", "g", "green", "b", "blue", ...
"w", "white", "k", "black"};
if (any (strcmpi (arg, colors)))
retval = true;
endif
endif
endfunction
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